Enabling caching for anonymous users in Drupal 7

In order to enhance site performance, Drupal 7 has several options on tuning its caching abilities. Caching for non-registered users is not enabled by default. Turning this on will cause Drupal to keep html copies of pages on hand for faster serving, increasing site speed and limiting repeated queries. Turning on caching for anonymous users in Drupal 7 can be done by following the simple instructions below.